How to implement an ACO algorithm for vehicle routing?

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habady
habady 2012-3-9
评论： Walter Roberson 2022-4-10
i need pre-written code to solve VRP using ACO or GA.
[Merged information from duplicate question]
anyone can help me with writing a code to implement ACO or Genetic Algorithm in solving VRP

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回答（3 个）

Walter Roberson
Walter Roberson 2012-3-9
Your existing question is still here and still active. I have merged your information from your newer phrasing.
Please do not open duplicate questions: it only confuses and frustrates people.
Arlene Natividad
Arlene Natividad 2018-1-22
hello i really need help. I need a source code to solve vrp using ant colony for my thesis. please help me. please
hafid oubouddi
hafid oubouddi 2022-4-9
hello, how to find parameters or solve equations of a system using ACO
  1 个评论
Walter Roberson
Walter Roberson 2022-4-10
You create a fitness function -- a function that has a lower value if the model or system of equations is solved better. Then you pass that fitness function into your ACO code.
When you have a model, then it is common to create the fitness function using the strategy:
  • use the passed-in trial values of the parameters to predict what the results would be at each configuration of independent variables
  • subtract the known values at those locations
  • square each individual result
  • sum those squares
This is sometimes known as a "sum of squared errors" function. It is the square of the Euclidean distance between the predicted values and the known values; a perfect fit would give a sum of squared errors of zero.
When you have a system of equations:
  • take the left sides of the equations minus the right side of the equations
  • square those differences
  • sum those squares
This sum of squared errors would mathematically be zero when each of the equations balanced. (In practice you can run into numeric difficulties.)

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